Method and apparatus for making slides



Feb. 16, 1954 BARTER 2,669,279

METHOD AND APPARATUS FOR MAKING SLIDES Filed June so, 1950 A 22' b :2] 925 .5 [.7 23-- 54 4543 13 4 4.5 34 23 [5 [0 J6 FIG.5 4

'INVENTOR.

' I ROBERT EBARTER BY WZZW ZW flmzl damz ATTO R N EYS Patented Feb. 16, 1954 OFFICE METHOD AND APPARATUS FOR MAKING v SLIDES Robert F. Barter, Ruth, Nev. Application June 30, 1950, Serial No. 171,519

4 Claims. 1

This invention relates to improvements in method and apparatus for making stereopticon slides from transparencies, the primary object of the invention being to provide means whereby accuracy in the assembling of the slide components, including glass plates, film, or transparency and mask, and maintains such accurate assembly in the clamping of the components to: gether, and while the components are rotated to.

conveniently position the different edges thereof for application of suitable cement thereto for fusing the edges and securing the components to provide simple and efiicient apparatus of the f character indicated above which procures initial together to complete the slide, the said apparatus being adaptable to the making of only one or a plurality of slides at a time.

A further important object of the invention is to provide an easier, quicker and more eflicient method of making the slides which results in slides of uniformly accurate construction. 6 Other important objects and advantageous features of the invention will be apparent from the 1 following description and the accompanying,

drawings, wherein, for purposes of illustration only, a specific embodiment of apparatus is set forth in detail, and certain steps in the method are graphically show'n.

In the drawings, wherein like numerals designate like parts throughout the several views:

Figure 1 is a side elevation of the press com-- ponent of theapparatus, showing a lurality of slide assemblies clamped therein, and showing in dotted lines, in association therewith, before withdrawal, the "slide assembly carrier;

Figure 2 is a right-hand end elevation of Figvure 1;

Figure 3 is {a side elevation, partly broken away, of the carrier;

.Figure 4 is .a transverse vertical section taken on the line 4-4 of Figure 3;

Figure 5 is an enlarged fragmentary horizontal section taken on the line 5-5 of Figure 1; and

Figure 6 is an exploded group perspective view of a plurality of slide assemblies, one of the dis carded separators being shown in dotted lines.'. Referring-in detail to the drawings, the illus: trated apparatus comprises the press 9, the car rier I0, the relatively thin, L-shaped separators II, and the relatively thick spacers I2.

The press 9 can beformed efliciently of a'frame 6 of rigid tubing or pipe providing a horizontal base portion I 4, a left-hand upright I5, and a righthand upright I 6. Pieces I! like half-washers can be welded or otherwise secured to the outer sides of the lower ends of the uprights to provide feet for supporting the frame in an upright position on a supporting surface.

The left-hand upright I'5 has at its upper end an inwardly projecting boss I8 providing a mounting for a bearing in the form of a shank I 9 terminating in a ball 20. The ball 20 is swivelly confined in a socket 2| in a boss 22 on the outward side of a clamping plate 23. The clamping plate 23 is rectangular and smaller than, but of the same proportions, as the slides to be made up, and has a plane, polished clamping face 24.

The upper end of the righthand upright I6 is traversed by a'horizontal clamping screw 25 extending parallel to the base portion I 4 and axially aligned with the bearing ball 20 on the left-hand upright I5. The screw 25 is threaded through a nut 26 welded or otherwise suitably secured to the inner side of the upright I6, as indicated in Figure 5. The outer end of the screw 25 has a crank handle 21 and its inward end has an enlargement 28 serving as a mounting for a bearing including an axial shank 29 terminating in aball 30. The ball 30 is swivelly confined in a socket 2| in the boss 22' of a clamping plate 23' similar to the clamping plate 23, and similarly having a plane, polished clamping face 24".

The carrier I 0 comprises a longitudinally elongated box having a bottom wall 32, side walls 33, and end walls 34, the dimensions and spacings of the walls corresponding to the dimensions of the slides and the number of such slides to be carried at one time. The end walls 34 are formed with similar rectangular openings 35 opening through receiving the clamping plates 23 and 23'. The bottom edges 310i the openings 35 are so located that when the carrier I!) is in inoperativerelation to the clamping plates, the carrier bottom'wall supportably engages the lower edges of the slide components with the carrier side walls 33 entheir upper edges 36 for conformably I plates assembling one or more slides, each assembly consisting of a film or transparency 40, a rectangular mask 4I having portions on opposite sides of the transparency 40, and two glass plates 42, one on each side of the masked transparency. Where a plurality of slide assemblies is involved, their components are placed upright in the carrier II), with a cardboard or other suitable material, L.'shaped separator I positioned between each assembly, with one 'arm' 43 positioned horizontally in line with the lower edges of the components and the other arm 44 vertically in line with a side edge of-thevcomponents ias shown in Figure 6. A spacer I2 of the same size and dimensions as the press clamping plates 23, 23, but substantially thicker than theseparators II, is placed between adjacent assemblies. .;The dimensions of the separator arms 43 and M are such that the spacers I2 are forced to occupy a correctly vertical and laterally centered position wwith-vrespect to the glass plates 42 which-they separate. r

With the slide assemblies" arranged. in, the: car- :.='riedl8,"as above -;described, the carrier I; is

I broughtupwardly toengage the-end wall;open-" wingswsfiuwith the clamping plates 23, f2 3',uthe

clamping plates first having been given:the corerect spacing, from each' other by manipulating ethe-ipress crank ,handler2'l, so that the contents ofxvthei carrier assume aposition-- between the .iclamping faces 24, T 2d of the clamping plates. With-the carrier Idheldyin place, the. crank .-handle21 isgoperated to. clamp the single slide irassembl-y or the plurality of slide assemblies to ":gether; so that adjacentcomponents: are in muzltually; compressive: relation-with each. other and FIWith the :spacers; I2. Upon.sdownward-"withdrawal: of. :the: carrier 3 I 0,:;the;: spacers I 2--being thickerthan .the: separators I I;,,: the; separators ".Idll'rOll'DLOf place, and all four edges. of:th-e:com-" .ponents of the clamped slide :"assembliesware}exvposed and readily accessible. ThfiSW-iVGIIIlOUIliJ- qing of: the, clamping plates 23, 231 provides. for uuniformrclamping of a plurality .ofj,.slide.,asscmblies andnfacilitates positioning'thereof for lclamping :between. the clamping plates.

Withthel-slide assemblies clamped ask-above :described; and--theseparators. II .being goutiof 3 the way,".tsuitable adhesive; or cement; can :be applied to. fuse together theedgesiiof; the adj acent slide components; This operation. of. fusing;ma- :terial is rendered easier and: more-accurate by rotating the clamped assemblies-0n: the? bearing -balls-2Wand3ii, soas tov bring: up; eachzedge: in 1:.turn.

f It should; be noted that before? assemblingz the ecomponents for. the. slides; the-glass plates 42: are ucleaned.withalcoholor acetone andgair dried, and the film or transparency 40; and the. mask 4| rare cleaned ofdust or lint. Preferably; moisture and'-heatresistant.cement is: 115.8(L2181I1d2 can wbe riap'plied directly tothe edgesof theslidecomoponents'trom the tube. The-resultant slides are tair. and-'waterproot'. After a drying period? of about thirty minutes, the clamping-screw 25 is tnrned in aadirection toaseparate' the clamping xplates'23. and 23; and thecompleted slides '45 i and :release: the slides: and the: spacers I2.

L-claim:

1; In a method of making a plurality'oi slides reachucornposed ofan assembly of components in- .pcluding masked transparency and glass plates t at; opposite: sides: of; the transparency; thetrsteps ois-transiently.supportinguthe: components:.;and

=- ;.adj acent assemblies loosely irr. ;regis,try separatev ing the assemblies by placing spacing means between adjacent assemblies and leaving marginal portions of the assemblies exposed, applying compressive force to opposite ends of the resultant group of assemblies so as to compress the components of each group together and so as to compress the spacing means between adjacent assemblies, removing the transient holding sup- ;a'port,iandiapplying fusingiqcementf to the edges of the assemblies.

2. In a method of making a plurality of slides weach composed of an assembly of components inacluding a..masked.-transparency and glass plates Hat opposite sides of the transparency, the steps of transiently supporting the components and adjacent-assemblies loosely in registry, separat- .ing the.,assemblies by placing spacing means between adjacent assemblies and leaving marginal portions: of the assemblies exposed, applying compressive force to opposite ends of the resuit-ant group of assemblies sofas: to compress the-components;- of each group together:.-and' so a as to isicompress the, spacing; means between tad- =i-jacent assemblies,=:remoying;the transient hold- 20 ing support, 1 and, applying fusing: cementetoethe edges ofthe assemblies while. rotating the=group of assemblies.

3.1In apparatus forymaking argroupfofislides, p r omp i i s airbase." elements-extendin 39 laterally from said base and xspaced along said base from each other;v axfirsti clampingaplate swivelly: mounted on one of said elementsazand seeing: the other element; a;'-clamping vscrew mounted on said other; element" in alignment 5 with. said first clamping plate, a secondxclampplate swivelly;mounted on: said. clamping :screw and facing saidrfirst clampmgplataitand .1 meansv for operatinggaidclamping screw, said elamping plates.beinggpolygonal, aislidewcarrier comprising a longitudinal :wall;'=, sidewalls: along opposite sides of said longitudinal wall,:,and:end walls on opposite ends of; said longitudinally/all, =the: slides -being .adapted; t0 ;b8,r3 positioned :gon ,isaid longitudinal :wall between said sidewallsc-and ,3 endwalls, so'as to be loosely held inregistry as a group, said; endwalls beingeformed with polygonal e-openingsz extending throughyan; edge; thereof-eon- ,forining in size and'shape andgadapted to. receive saidxfirst and; second: clamping :plates qwhereby ,the' carrieryand the: groupof slides are heldcin gen-forcedyregistered condition: and; in, alignment with the clamping platestandrarexconnectedsto .Jhe; clamping; plates" for; rotation therewith; op-

eration' of said clamping screw in ,one;.;:dire,ction ,serving. to compress, the group of; registered slides together int saidcarrier between said; first :and t-secondclamping, plates; said carrier; thenebein removable: fromthe. group: of izclamped. plates to expose edgessrthereof theretofrom y; enclosed-rby theucarrier.

4. In apparatus for making a plurality-1 of 3 slides, 311-0313716135 :fon;;removably holding; a stack of slides in registry, said carrierezcomprising a longitudinal :wall, sidewalls; along opposite sides 05 of said longitudinalwalhand:end-wa1ls-extend- -,ing. betweenpsaid'; sidewalls at the: ends: of. the longitudinal wall, said .endwalls:- being-z :formed with non-:circular: openings extending through an edgethereof, a'press'having a pair'of aligned mgclamping platessmaller: in area. than the slides, said plates being non-circular in shape,.the openings in .the:.carrier endwalls 1 being substantially of the :i same: size andlpshape as the clamping plates so. thatizwhen,:the.;clamping plates" are poitio ne 1-,- imsaid openings Lsaid:-carrier is ialigned carrier sidewise relative to the plates in a direc tion to pass the clamping plates out of said open ings, said clamping plates being engageable with the end slides of the stack through the openings in the carrier endwalls when seated in the carrier endwall openings and being movable toward each" other to compress and clamp the slides together in registry with each other and in alignment with the clamping plates, and means for urging the clamping plates toward each other to compress the slides together sufliciently to support the stack of slides independently of said carrier, said carrier then being removable from the stack and from the clamping plates to expose edges of said 'des otherwise enclosed by said carrier.

ROBERT F. BARTER.

References Cited in the file of this patent UNITED STATES PATENTS Number Number 4 Name Date Fix et a1. Nov. 15, 1932 Pilbad et a1. Dec. 11, 1934 Brown et a1 Oct. 14, 1941 Crabbs Aug. 31, 1943 Carver Apr. 10, 1945 Patrick Feb. 7, 1950 FOREIGN PATENTS Country Date Switzerland q July 1, 1907 

